A report of 100 pages is to be typed by three typists.Typist A can type 100 pages in 10 hours.Typist B can type the same pages in 20 hours. and Typist C can type in 25 hours,All the three typist started typing at 09:00 A.M. At 01:00 P.M., Typist A stopped typing. The other two typist finished the job Approximately at what time the report was typed ?